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Tomographic analysis of neutron and gamma pulse shape distributions from liquid scintillation detectors at Joint European Torus
Giacomelli, L. ...
aip Publishers PublicationsTopicsCollections|LibrariansAuthors Your access is provided by: Jozef Stefan Institut Register to create your user account, or sign in if you have an existing account ...Additional sign in Sign in via Shibboleth/Athens My cart Export citations Add to my favorites Recommend to library Subscribe to email alerts Submit an article Reprints & Permissions Subscribe to RSS Access Key Free Content Open Access Content Subscribed Content Free Trial Content Home > Publishers > AIP Publishing > Review of Scientific Instruments > Volume 85, Issue 2 > Article banner image F Tomographic analysis of neutron and gamma pulse shape distributions from liquid scintillation detectors at Joint European Torus Download PDF L. Giacomelli1,2, S. Conroy1,3, G. Gorini2, L. Horton1, A. Murari1, S. Popovichev1, D. B. Syme1 and JET EFDA Contributors1,a) + VIEW AFFILIATIONS a) See the Appendix of Romanelli et al., Proceedings of the 24th IAEA Fusion Energy Conference, San Diego, USA, 2012. Rev. Sci. Instrum. 85, 023505 (2014); http://dx.doi.org/10.1063/1.4864122 PREVIOUS ARTICLETABLE OF CONTENTSNEXT ARTICLE facebook twitter Share this page separator email print this page Abstract Full Text References (32)Cited By (1)Data & Media Metrics Related ABSTRACT The Joint European Torus (JET, Culham, UK) is the largest tokamak in the world devoted to nuclear fusion experiments of magnetic confined Deuterium (D)/Deuterium-Tritium (DT) plasmas. Neutrons produced in these plasmas are measured using various types of neutron detectors and spectrometers. Two of these instruments on JET make use of organic liquid scintillator detectors. The neutron emission profile monitor implements 19 liquid scintillation counters to detect the 2.45 MeV neutron emission from D plasmas. A new compact neutron spectrometer is operational at JET since 2010 to measure the neutron energy spectra from both D and DT plasmas. Liquid scintillation detectors are sensitive to both neutron and gamma radiation but give light responses of different decay time such that pulse shape discrimination techniques can be applied to identify the neutron contribution of interest from the data. The most common technique consists of integrating the radiation pulse shapes within different ranges of their rising and/or trailing edges. In this article, a step forward in this type of analysis is presented. The method applies a tomographic analysis of the 3-dimensional neutron and gamma pulse shape and pulse height distribution data obtained from liquid scintillation detectors such that n/% discrimination can be improved to lower energies and additional information can be gained on neutron contributions to the gamma events and vice versa.
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